从 Ubuntu 14.10 升级到 15.04 后，我的 wifi 出现了一些问题。我在菜单栏上没有看到无线网络选项。
有来自 wireless-info 脚本的报告无线资讯：
1）
########## wireless info START ##########
Report from: 19 Sep 2015 19:08 CEST +0200
Booted last: 19 Sep 2015 16:04 CEST +0200
Script from: 14 Jul 2015 17:04 UTC +0000
2）
##### release ###########################
Distributor ID: Ubuntu
Description: Ubuntu 15.04
Release: 15.04
Codename: vivid
3）
##### kernel ############################
Linux 3.2.0-70-generic #105-Ubuntu SMP Wed Sep 24 19:49:16 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, quiet, splash, vt.handoff=7
4）
##### desktop ###########################
Ubuntu
5）
##### lspci #############################
02:00.0 Network controller [0280]: Intel Corporation WiFi Link 5100 [8086:4232]
Subsystem: Intel Corporation WiFi Link 5100 AGN [8086:1201]
Kernel modules: iwlwifi
06:00.0 Ethernet controller [0200]: Marvell Technology Group Ltd. 88E8055 PCI-E Gigabit Ethernet Controller [11ab:4363] (rev 13)
Subsystem: Samsung Electronics Co Ltd Device [144d:c04a]
Kernel driver in use: sky2
6）
##### lsusb #############################
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 008 Device 002: ID 0a5c:2101 Broadcom Corp. BCM2045 Bluetooth
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 0ac8:c302 Z-Star Microelectronics Corp. Vega USB 2.0 Camera
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
7）
##### PCMCIA card info ##################
8）
##### rfkill ############################
0: hci0: Bluetooth
Soft blocked: yes
Hard blocked: no
9）
##### lsmod #############################
iwlwifi 401083 0
mac80211 506862 1 iwlwifi
cfg80211 205774 2 mac80211,iwlwifi
mxm_wmi 13021 1 nouveau
wmi 19256 1 mxm_wmi
10）
##### interfaces ########################
auto lo
iface lo inet loopback
11）
##### ifconfig ##########################
eth0 Link encap:Ethernet HWaddr <MAC 'eth0' [IF]>
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:19
12）
##### iwconfig ##########################
lo no wireless extensions.
eth0 no wireless extensions.
13）
##### route #############################
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
14）
##### resolv.conf #######################
15）
##### network managers ##################
Installed:
NetworkManager
Running:
root 578 1 0 16:05 ? 00:00:00 /usr/sbin/NetworkManager --no-daemon
16）
##### NetworkManager info ###############
GENERAL.DEVICE: eth0
GENERAL.TYPE: ethernet
GENERAL.VENDOR: Marvell Technology Group Ltd.
GENERAL.PRODUCT: 88E8055 PCI-E Gigabit Ethernet Controller
GENERAL.DRIVER: sky2
GENERAL.DRIVER-VERSION: 1.30
GENERAL.FIRMWARE-VERSION: N/A
GENERAL.HWADDR: <MAC 'eth0' [IF]>
GENERAL.MTU: 1500
GENERAL.STATE: 20 (unavailable)
GENERAL.REASON: 2 (Device is now managed)
GENERAL.UDI: /sys/devices/pci0000:00/0000:00:1c.3/0000:06:00.0/net/eth0
GENERAL.IP-IFACE:
GENERAL.NM-MANAGED: yes
GENERAL.AUTOCONNECT: yes
GENERAL.FIRMWARE-MISSING: no
GENERAL.CONNECTION: --
GENERAL.CON-UUID: --
GENERAL.CON-PATH: --
CAPABILITIES.CARRIER-DETECT: yes
CAPABILITIES.SPEED: unknown
CONNECTIONS.AVAILABLE-CONNECTION-PATHS:
WIRED-PROPERTIES.CARRIER: off
17）
##### NetworkManager.state ##############
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
18）
##### NetworkManager.conf ###############
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
[ifupdown]
managed=false
19）
##### NetworkManager profiles ###########
[[/etc/NetworkManager/system-connections/Hot-Spot Bulwar]] (600 root)
[connection] id=Hot-Spot Bulwar | type=802-11-wireless
[802-11-wireless] ssid=Hot-Spot Bulwar | mac-address=<MAC address>
[ipv6] method=auto
[ipv4] method=auto
[[/etc/NetworkManager/system-connections/WRS_EiTI]] (600 root)
[connection] id=WRS_EiTI | type=802-11-wireless
[802-11-wireless] ssid=WRS_EiTI | mac-address=<MAC address>
[ipv4] method=auto
[ipv6] method=auto
[[/etc/NetworkManager/system-connections/L70]] (600 root)
[connection] id=L70 | type=802-11-wireless
[802-11-wireless] ssid=L70 | mac-address=<MAC address>
[ipv4] method=auto
[ipv6] method=auto
20）
##### iw reg get ########################
Region: Europe/Warsaw (based on set time zone)
country 00: DFS-UNSET
(2402 - 2472 @ 40), (N/A, 20), (N/A)
(2457 - 2482 @ 40), (N/A, 20), (N/A), NO-IR
(2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, NO-IR
(5170 - 5250 @ 80), (N/A, 20), (N/A), NO-IR
(5250 - 5330 @ 80), (N/A, 20), (N/A), DFS, NO-IR
(5490 - 5730 @ 160), (N/A, 20), (N/A), DFS, NO-IR
(5735 - 5835 @ 80), (N/A, 20), (N/A), NO-IR
(57240 - 63720 @ 2160), (N/A, 0), (N/A)
21）
##### iwlist channels ###################
lo no frequency information.
eth0 no frequency information.
22）
##### iwlist scan #######################
lo Interface doesn't support scanning.
eth0 Interface doesn't support scanning.
23）
##### module infos ######################
[iwlwifi]
filename: /lib/modules/3.2.0-70-generic/kernel/drivers/net/wireless/iwlwifi/iwlwifi.ko
license: GPL
author: Copyright(c) 2003-2011 Intel Corporation <[email protected]>
version: in-tree:
description: Intel(R) Wireless WiFi Link AGN driver for Linux
firmware: iwlwifi-5150-2.ucode
firmware: iwlwifi-5000-5.ucode
firmware: iwlwifi-6000g2b-6.ucode
firmware: iwlwifi-6000g2a-5.ucode
firmware: iwlwifi-6050-5.ucode
firmware: iwlwifi-6000-4.ucode
firmware: iwlwifi-100-5.ucode
firmware: iwlwifi-1000-5.ucode
firmware: iwlwifi-135-6.ucode
firmware: iwlwifi-105-6.ucode
firmware: iwlwifi-2030-6.ucode
firmware: iwlwifi-2000-6.ucode
srcversion: AF0D27A3E5369F7401307D5
depends: mac80211,cfg80211
intree: Y
vermagic: 3.2.0-70-generic SMP mod_unload modversions
parm: swcrypto:using crypto in software (default 0 [hardware]) (int)
parm: queues_num:number of hw queues. (int)
parm: 11n_disable:disable 11n functionality (int)
parm: amsdu_size_8K:enable 8K amsdu size (int)
parm: fw_restart:restart firmware in case of error (int)
parm: ucode_alternative:specify ucode alternative to use from ucode file (int)
parm: antenna_coupling:specify antenna coupling in dB (defualt: 0 dB) (int)
parm: bt_ch_inhibition:Enable BT channel inhibition (default: enable) (bool)
parm: plcp_check:Check plcp health (default: 1 [enabled]) (bool)
parm: ack_check:Check ack health (default: 0 [disabled]) (bool)
parm: wd_disable:Disable stuck queue watchdog timer 0=system default, 1=disable, 2=enable (default: 0) (int)
parm: bt_coex_active:enable wifi/bt co-exist (default: enable) (bool)
parm: led_mode:0=system default, 1=On(RF On)/Off(RF Off), 2=blinking (default: 0) (int)
parm: power_save:enable WiFi power management (default: disable) (bool)
parm: power_level:default power save level (range from 1 - 5, default: 1) (int)
parm: auto_agg:enable agg w/o check traffic load (default: enable) (bool)
parm: no_sleep_autoadjust:don't automatically adjust sleep level according to maximum network latency (default: true) (bool)
[mac80211]
filename: /lib/modules/3.2.0-70-generic/kernel/net/mac80211/mac80211.ko
license: GPL
description: IEEE 802.11 subsystem
srcversion: 1944D882391CC5F32CA6325
depends: cfg80211
intree: Y
vermagic: 3.2.0-70-generic SMP mod_unload modversions
parm: ieee80211_default_rc_algo:Default rate control algorithm for mac80211 to use (charp)
parm: max_nullfunc_tries:Maximum nullfunc tx tries before disconnecting (reason 4). (int)
parm: max_probe_tries:Maximum probe tries before disconnecting (reason 4). (int)
parm: probe_wait_ms:Maximum time(ms) to wait for probe response before disconnecting (reason 4). (int)
[cfg80211]
filename: /lib/modules/3.2.0-70-generic/kernel/net/wireless/cfg80211.ko
description: wireless configuration support
license: GPL
author: Johannes Berg
srcversion: A289A224DC04F871A44431D
depends:
intree: Y
vermagic: 3.2.0-70-generic SMP mod_unload modversions
parm: ieee80211_regdom:IEEE 802.11 regulatory domain code (charp)
parm: cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool)
24）
##### module parameters #################
[iwlwifi]
11n_disable: 0
ack_check: N
amsdu_size_8K: 1
antenna_coupling: 0
auto_agg: Y
bt_ch_inhibition: Y
bt_coex_active: Y
fw_restart: 1
led_mode: 0
no_sleep_autoadjust: Y
plcp_check: Y
power_level: 0
power_save: N
queues_num: 0
swcrypto: 0
ucode_alternative: 1
wd_disable: 0
[mac80211]
ieee80211_default_rc_algo: minstrel_ht
max_nullfunc_tries: 2
max_probe_tries: 5
probe_wait_ms: 500
[cfg80211]
cfg80211_disable_40mhz_24ghz: N
ieee80211_regdom: 00
25）
##### /etc/modules ######################
lp
26）
##### modprobe options ##################
[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci
[/etc/modprobe.d/blacklist.conf]
blacklist evbug
blacklist usbmouse
blacklist usbkbd
blacklist eepro100
blacklist de4x5
blacklist eth1394
blacklist snd_intel8x0m
blacklist snd_aw2
blacklist i2c_i801
blacklist prism54
blacklist bcm43xx
blacklist garmin_gps
blacklist asus_acpi
blacklist snd_pcsp
blacklist pcspkr
blacklist amd76x_edac
[/etc/modprobe.d/blacklist-rare-network.conf]
alias net-pf-3 off
alias net-pf-6 off
alias net-pf-9 off
alias net-pf-11 off
alias net-pf-12 off
alias net-pf-19 off
alias net-pf-21 off
alias net-pf-36 off
[/etc/modprobe.d/iwlwifi.conf]
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211
[/etc/modprobe.d/mlx4.conf]
softdep mlx4_core post: mlx4_en
[/etc/modprobe.d/modesetting.conf]
options cirrus modeset=1
options mgag200 modeset=1
[/etc/modprobe.d/oss-compat.conf]
install snd-pcm modprobe --ignore-install snd-pcm $CMDLINE_OPTS && { modprobe --quiet snd-pcm-oss ; : ; }
install snd-mixer modprobe --ignore-install snd-mixer $CMDLINE_OPTS && { modprobe --quiet snd-mixer-oss ; : ; }
install snd-seq modprobe --ignore-install snd-seq $CMDLINE_OPTS && { modprobe --quiet snd-seq-midi ; modprobe --quiet snd-seq-oss ; : ; }
27）
##### rc.local ##########################
exit 0
28）
##### pm-实用程序 #############################
29）
##### udev rules ########################
[/etc/udev/rules.d/70-persistent-net.rules]
# PCI device 0x11ab:/sys/devices/pci0000:00/0000:00:1c.3/0000:06:00.0 (sky2)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'eth0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x8086:/sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.0 (iwlwifi)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC address>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"
30）
##### dmesg | grep iwlwifi #############################
[ 62.144763] iwlwifi 0000:02:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[ 62.144896] iwlwifi 0000:02:00.0: setting latency timer to 64
[ 62.144951] iwlwifi 0000:02:00.0: pci_resource_len = 0x00002000
[ 62.144953] iwlwifi 0000:02:00.0: pci_resource_base = ffffc90000658000
[ 62.144956] iwlwifi 0000:02:00.0: HW Revision ID = 0x0
[ 62.145823] iwlwifi 0000:02:00.0: irq 46 for MSI/MSI-X
[ 62.146092] iwlwifi 0000:02:00.0: Detected Intel(R) WiFi Link 5100 AGN, REV=0x54
[ 62.146577] iwlwifi 0000:02:00.0: L1 Enabled; Disabling L0S
[ 62.175234] iwlwifi 0000:02:00.0: device EEPROM VER=0x11f, CALIB=0x4
[ 62.175237] iwlwifi 0000:02:00.0: Device SKU: 0Xf0
[ 62.207045] iwlwifi 0000:02:00.0: Tunable channels: 13 802.11bg, 24 802.11a channels
[ 62.506823] iwlwifi 0000:02:00.0: request for firmware file 'iwlwifi-5000-5.ucode' failed.
[ 62.527136] iwlwifi 0000:02:00.0: request for firmware file 'iwlwifi-5000-4.ucode' failed.
[ 62.531093] iwlwifi 0000:02:00.0: request for firmware file 'iwlwifi-5000-3.ucode' failed.
[ 62.532054] iwlwifi 0000:02:00.0: request for firmware file 'iwlwifi-5000-2.ucode' failed.
[ 62.532825] iwlwifi 0000:02:00.0: request for firmware file 'iwlwifi-5000-1.ucode' failed.
[ 62.532829] iwlwifi 0000:02:00.0: no suitable firmware found!
[ 62.533051] iwlwifi 0000:02:00.0: PCI INT A disabled
########## wireless info END ############
31）
ls /lib/firmware/ | grep iwlwifi
iwlwifi-1000-5.ucode
iwlwifi-100-5.ucode
iwlwifi-105-6.ucode
iwlwifi-135-6.ucode
iwlwifi-2000-6.ucode
iwlwifi-2030-6.ucode
iwlwifi-3160-10.ucode
iwlwifi-3160-12.ucode
iwlwifi-3160-13.ucode
iwlwifi-3160-7.ucode
iwlwifi-3160-8.ucode
iwlwifi-3160-9.ucode
iwlwifi-3945-2.ucode
iwlwifi-4965-2.ucode
iwlwifi-5000-5.ucode
iwlwifi-5150-2.ucode
iwlwifi-6000-4.ucode
iwlwifi-6000g2a-5.ucode
iwlwifi-6000g2a-6.ucode
iwlwifi-6000g2b-6.ucode
iwlwifi-6050-5.ucode
iwlwifi-7260-10.ucode
iwlwifi-7260-12.ucode
iwlwifi-7260-13.ucode
iwlwifi-7260-7.ucode
iwlwifi-7260-8.ucode
iwlwifi-7260-9.ucode
iwlwifi-7265-10.ucode
iwlwifi-7265-12.ucode
iwlwifi-7265-13.ucode
iwlwifi-7265-8.ucode
iwlwifi-7265-9.ucode
iwlwifi-7265D-10.ucode
iwlwifi-7265D-12.ucode
iwlwifi-7265D-13.ucode
iwlwifi-8000C-13.ucode
- - - - - - - - - - 编辑 - - - - - - - - - - - - - - - - - -
我检查了权限是否iwlwifi-5000-5.ucode正确，
-rw-r--r-- 1 root root 340696 Jul 29 08:57 iwlwifi-5000-5.ucode
我发现该文件的所有者是 root，并且所有人都可以读取。这肯定是其他原因。
答案1
您的 Ubuntu 15.04 内核错误。您需要先安装正确的内核。
下载这些文件并将其复制到您的主文件夹。
然后在终端运行
sudo dpkg -i linux*.deb
重启。
如果您的网络连接恢复，请运行
sudo apt-get install linux-generic
安装元包。这将启用内核更新。
答案2
你试试这个：
sudo apt-get install linux-amd64-efi_ linux-efi
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install -f
sudo apt-get install linux-efi*
这样也许能很好地发挥作用。